Gear box



Feb. 23, 1932.

R. E. c. DELEVOYE GEAR BOX Filed May 21, 19150 4 Sheets-Sheet l EOZEI'Z'E. 6'. pelevqye 4 Sheets-Sheet 2 Feb. 23, 1932. R. E. c. DELEVOYEI GEARBOX Filed May 21, 1950 r s a? M W m a? I. a Q a w um s \I w MW p a Feb.23, 1 932. C DELEVOYE 1,846,250

GEAR BOX Filed May 21, 1950 4 Sheets-Sheet 3 Fig.3

IrwenZbr' Feb. 23, 1932.

R. E. c. DELEVOYE 1,846,250

GEAR BOX Filed May 21, 1930 4 Sheets-Sheet 4 Rolerl" E 6'. lkleuoyavhwfw d fiamw ya Patented Feb. 23, 1932 UNITED STATES ROBERT EMILEcrimes DELEVOYE, or rams, FRANCE, assrcnon ,Tosocrnrn Anonmn nnsnivclnns ETABLISSEM snnvn, rmncn, A JOINT-STOCK coMrAnYor-rnANcn omitBOX Application filed May 21, 1930, Serial No; 454,412,1116. in FranceApril "18, 1930,

The present invention relates to certain improvements in the :gear boxdescribed in U. S. Patent No. 1,765,133. Saidiniprovements relate moreparticularly tothe arrangement of the driving shafts, sliding gears andpinions and their object is to enable a reduction of the total length ofthe unit to be obtained, as also areductionin the amplitude of thelongitudinal movements to be imparted to the several moving members'forthe various gear changes; the design is moreover more rigid.

According to the invention, the gear box for obtaining four speeds, oneof which is a direct drive, comprises a driving shaft se cured to adriving pinion, a driven shaft in alignment with the driving shaft andsecured to an internally toothed plate, an eccentric fixed drum onwhichvis mounted an intermediate gear train having an external toothingconstantly meshing'with the internal toothing of the plate of the drivenshaft, and an internal toothing with which a pinion driven by thedriving shaft can engage, a sleeve for obtaining direct drive which isadapted to slide on the driven shaft, con stantly driven by the drivingshaft and which connects said shaft to the driven shaft by coupling itwith corresponding means provided at the end of the driven shaft, saidsleeve having moreovera pinion adapted to mesh with the internaltoothing of the intermediate gear traincarried by the eccentric drum, acounter shaft parallel to the driving and driven shafts, and on which ismounted pinion constantly meshing with the driving pinion, and a slidinggear on said shaft having two external toothings adapted to engage, theone with a second external toothing carried by the intermediate geartrain, and the other with an external toothingcan ried by the plate ofthe driven shaft, said sliding gear moreover constantly rotating solidwith the said counter shaft, means being provided to control and holdthe aforementioned sliding gear and thesleeve securing direct drive inthe several positions into which they may be brought.

Said gear box may be completed by a reverse speed devicecomprising asecondcounter-sha ft on which is mounted a gear train of two pinionsadapted to be brought simultaneously into engagementythe -first with ione of the two external toot-hings ofthe sliding gear carried by thecountershaft, the second l with the external toothing of the plate ofthe driven shaft, I v

Other characteristics andpeculiarities 'of the invention will becomeapparent from the subsequent"description with reference to theaccompanying drawings in which: 7

Fig. 1 is longitudinal sectionalelevation (ontheaxis of the driving anddriven shafts) of a gear box in accordancewith the inven tion. r

Fig. 2 is-a corresponding cross section on the :line lI-IIof Fig; 1.

Fig. 3 is1another cross section on the line III-III of Fig. 1. i U

Fi 4 is a longitudinal section on the line IV Vof Fig. 2, that is tosay, on the axis of the reverse speed countershaft.

The gear box illustrated in thedrawings essentially comprises a casingvlwhich may be of'any suitable form and assembled inany suitable manner onthe chassis of the motor vehicle to which the gear boxillustrated issupposed to be adapted;

Thedr ivingshaft- 3 "connectedto the engine is supported in oneof thelateral cheeks of the casing 1, forexainple, in ball bearings 2. Saidshaft 3, whi-chcarries a driving pinion 4, hasformed in its end thecylindrical bore 5 in whichis engaged the corresponding "end of thedriven shaft 6 ('oritsextension) coaxial with the drivingshaftS. Thedriven shaft 6 is likewisesupported by means of ball bearings 7 in theother side cheek bf the easing 1. A sleeve9 for obtaining direct drive1s adapted to slide over the driving shaft ,3, and is rotated at thespeed of the shaft 3 by means of the grooves 4a; Said sleeve has aninner fluted portion 10 which may engage with the outergrooves 8 on thedrivenshaft 6 and an outer toothing 9owhich may engage with theinnertoothing 16 of the intermediate gear train 15. y

The gear box includes a drum12ri idly fixed, as by screws13, tooneof thecheeltsfof the casing 1, and eccentric-relative to the E'N'IS HOTCHKISS& TCIEr, OF SAINT-DENIS,

shafts 3 and 6, this eccentricity being moreover equal to half thedifference between the diameters of the pitch circles'of the toothings16 and 9a or 18 and'17. The drum 12 is hollow and thedriven shaft6 andthe driving pinion l-revolve in the bore thereof. Moreover, the end ofsaid drum is formed as a bearing 14 resting directly on the drivenshaft-6, sothat said "drum is rigidly supported at both ends. Thedrum-12 supports an intermediate gear train 15 loosely'mounted thereon.Said intermediate gear train 15 has an internal toothing 16 with whichmay engage an outentoothing 9a of the sleeve 9.

This engagement will be obtained provided that the eccentricitvof thedrum 12 is equal to that of the twointernal and external toothings 16and 9a which should mesh; furthermore, the drum 12 must belcut away at12a.

Moreover, at theother end of the intermediate geartrain 15 vis formed anexternal toothing 17 adapted to engage with the internal toothing 18formed in aplate 19 keyed tothe driven shaft 6.

to slide while being constantly rotated therewith by means of suitablegrooves, said slidplate 19 which ing gear having anexternaltoothedpinion 23 adapted to engage with anexternal toothing 24 ontheiinterrnediate gear train 15, and a second external pinion 25adaptedto engage with an external toothing 27 formed on the is secured to thedriven shaft6. 5 V

' A system of levers of a conventionaltype has been illustrated in theaccompanying drawings for controlling the longitudinal displacement ofthe sleeve 9 andthesliding gear 22. In the casein point; thedisplacement of the sleeve 9 may be'controlled by 'a fork 29 actuatedbythe usual gear lever 30 and which operatesthe circularcheek32 se euredto 'thesleevei-l. As for the displacement of the sliding gear 22 it iscont-rolled by a lever 33 secured to a verticalshaft 34 which is"controlled by an identical lever 33a actuated by a slide block 34aoperated by the lever30.f,' f

The above described gear box operates in the following-manneri 1 Toobtain direct drive, it is only necessary to displace the sleeve 9 bymoving the lever 30 so as to bring said sleeve into its left endposition. The toothing 1010f the sleeve 9 thus engages in the toothing 8of the driven shaft 6. The sleeve9 on the other hand constan'tlyrotating with the, driving shaft '3 through the medium of the grooveseta, the

driving shaft 3, and the. driven shaft 6 are thus made to rotate solid;the intermediate gear train 15 and pinions 21, 23 and 25 rotate idly.

For the third speed, the sleeve-9 is displaced towards the rightso asto. bring the external toothing 9a of said sleeve into engagement withthe internal toothing 160i t e intermediate gear train 15; The,drivethen takes'place through the medium'of the grooves 4a of thedriving shaft 3,the external toothing 9a, the [internal toothing 16, theexternal toothing 17 and the internal toothing 18 of the plate 19. Thepinions 21, 23 and 25 are rotated idly.

For the second speed, the sleeve 9 is left in the neutral position(positionshown ilrF ig. 1), and. the sliding gear '22 is shiftedto theleft so as to cause its; toothing 23 to engagewith the external toothing2 10f the intermediate gear train '15. A'lhe drive. isthen transmittedby the pinionl, the pinion 21, the toothing 23 of the sliding gear22,the toothing 24 of the intermediate, gear train 15, the externaltoothing -17 .offthe intermediate gear train. 15 and theinternal-toothing 18 ofthe plate 19 securedto: the .drivenshaft 6,- f 1For thefirst speed, the sleeve 9 is againv 1 left in neutral positionand the sliding gear 22 is shifted to the right so as to cause thetoothing 25 of said sliding. gear to engage with the external toothing27 of the plate 19 secured to the driven shaft 6. The drive'is thentransmitted .by the driving pinion 4, the pinion 21, the sliding gear22, the toothing25, theexternal toothing 27 and the plate 19. Theintermediate gear train 15 rotates idly.

u Thus thegear box according to the invene enabling reverse speed 'to'beobtained. For n this purpose, it is only necessary to provide,

as illustrated in Figs. 2 and 4,1 second counter shaft 35 paralleltotheaforementioned shafts,

and on which a sliding gear36 including pin f ions 37 and 38 rotatesloosely.v 'Whenthe slid;

ing gear 36 is shifted to the left (for example,

by thelever 39 controlledby the slide-block 40 and the lever, 30) thepinion 38is brought into gear with the pinion 23,.ofthe sliding gear 22,held in theneutral position, and the pinion 37 with the externaltoothing 27 of the plate 19 secured to the drivenshaft 6. The

direction of rotation of the driven shaft 6 is then reversed relative tothat of the driving shaft 3. In thisinstance, the intermediate geartrain-154 rotatesidly. H i 2 T 1 Itis moreover self-evident'that the;inven' til tion has only been described and illustrated here in a purelyexplanatory but in no way limitative manner, and that it could besubjected to modifications of detail without departing from the spiritthereof.

I claim:

1. In a change-speed gear, the combination of a driving shaft; a drivenshaft, a fixed hollow drum disposed eccentrically about'said driving anddriven shafts, an intermediate longitudinally fixed gear trainsurrounding and carried by said fixed drum, means for continuouslycoupling said intermediate gear train to one of said shafts, and meansmounted inside said hollow drum on one of said shafts and drivencontinuously by the shaft to which said intermediate gear is notcontinuously coupled, said second means being adapted to be selectivelyengaged with said intermediate gear train to transmit drive to saiddriven shaft.

In a change-speed gear, the combination of a driving shaft, a drivenshaft, a fixed hollow drum disposed eccentrically about said driving anddriven shafts, a sleeve slidably and loosely mounted on said drivenshaft, a pinion secured to said sleeve, an intermediate non-slidablegear train mounted on said fixed drum and including internally toothedportions, said fixed drum having a cut-away portion whereby saidinternally toothed portion of said intermediate gear train can engagewith said pinion, and means for continuously coupling said intermediategear train to said driven shaft.

53. In a change-speed gear, the combination of a driving shaft, a drivenshaft having a fluted portion, an internally toothed driving pinion faston said driving shaft, a sleeve slidably and loosely mounted on saiddriven shaft and including an external toothing adapted to engageconstantly with the inter nal toothing of said driving pinion and aninternal toothing engageable with the fluted portion of said drivenshaft upon displacement of said sleeve, whereby said driving and drivenshafts are directly connected together.

l. In a change-speed gear box, the combi nation of a driving shaft, adriven shaft in alignment with said driving shaft and journalled in abore thereof and having a fluted portion, an internally and externallytoothed driving pinion fast on said driving shaft, a fixed hollow drumdisposed eccentrically about said driving and driven shafts, anintermediate gear train mounted on said fixed drum and including twoexternally and one internally toothed portions, a platefast on saiddriven shaft and including an external toothing and an internallytoothed portion constantly gearing with one of said two externaltoothings of said intermediate gear train, a sleeve slidably and looselymounted on said driven shaft and including an exter nal toothing adaptedto engage constantly with the internal toothing of said driving pinion,and an internal toothing engageable with the fluted portion of saiddriven shaft in order to couple together said driving and driven shafts,a pinion secured to said sleeve and capable of engaging said internallytoothed portion of said intermediate gear train, a countershaft runningparallel to said driving and driven shafts, a pinion mounted on saidcountershaft and constantly gearing with said external toothing of saiddriving pinion, a sliding gear mounted on said countershaft andincluding two pinions and adapted to gear respectively with saidexternal toothing of said plate and the other of said two externaltoothings of said intermediate gear train, and selector means forshifting said sleeve and said sliding gear.

5. In a change-speed gear, the combination of a driving shaft, a drivenshaft havin a fluted portion, an internally toothed drivlng pinion faston said driving shaft, a sleeve slidably and loosely mounted on saiddriven shaft and including an extended toothing adapted to engageconstantly with the internal toothing of said driving pinion and aninternal toothing engageable with the fluted portion of said drivenshaft upon displacement of said sleeve, a fixed hollow drum disposedeccentrically about said driving and driven shafts, an intermediatenon-slidable gear train mounted on saidhollow drum and including aninternally toothed portion with which a pinion mounted on said sleevemay be slid into engagement, said drum having to this end a cut-awayportion, and means for continuously coupling said intermediate geartrain to said driven shaft.

ROBERT EMILE CHARLES DELEVOYE;

